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DDR Memory

DDR SDRAM Memory

(double data rate synchronous dynamic random access memory) is a class of memory integrated circuit used in computers. It achieves nearly twice the bandwidth of the preceding [single data rate] SDRAM by double pumping (transferring data on the rising and falling edges of the clock signal) without increasing the clock frequency. With data being transferred 64 bits at a time, DDR SDRAM gives a transfer rate of (memory bus clock rate) � 2 (for dual rate) � 64 (number of bits transferred) / 8 (number of bits/byte). Thus with a bus frequency of 100 MHz, DDR SDRAM gives a maximum transfer rate of 1600 MB/s. JEDEC has set standards for speeds of DDR SDRAM, divided into two parts: The first specification is for memory chips and the second is for memory modules. As DDR-SDRAM is superseded by the newer DDR2 SDRAM, the older version is sometimes referred to as DDR1-SDRAM.

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	PC1600 DDR200 CL2 184pin ECC Registered DIMM 256MB PC1600 DDR200 CL2 184p Registered ECC DIMM (p/n BLA) -


	PC2100 DDR266 100-pin SODIMM Memory (100 Pin DDR 266MHz SODIMM for Printers) 64MB 100p PC2100 DDR-266 CL2.5 DDR SODIMM (p/n BOK) - 128MB 100-pin PC2100 DDR Printer SODIMM (p/n AED) - 256MB 100-pin PC2100 DDR Printer SODIMM (p/n AEE) -

PC2100 DDR266 184-Pin UDIMM Memory

(184 Pin DDR 266MHz Non ECC for Desktops)

128MB PC2100 DDR266 1Rx16 Single Rank Unbuffereed nonECC 184-pin DIMM (p/n ACU) - 256MB PC2100 DDR266 CL2.5 2Rx8 Unbuffered nonECC 184-pin DIMM (p/n ALQ) - 256MB PC2100 DDR266 CL2 1Rx8 Unbuffered nonECC 184-pin DIMM (p/n BHB) - 512MB PC2100 DDR266 CL2.0 2Rx8 Unbuffered nonECC 184-pin DIMM (p/n AGA) - 1GB 184-pin PC2100 CL2.5 16c 64x8 DDR266 2Rx8 2.5V SDRAM DIMM (p/n ACI)

PC2100 DDR266 184-Pin ECC UDIMM Memory

(184 Pin DDR 266MHz ECC DIMM for Desktops)

512MB PC2100 DDR266 CL2.5 2Rx8 Dual Rank Unbuffered ECC 184-pin DIMM (p/n AGI) - 512MB PC2700 DDR333 CL2.5 1Rx8 Single Rank Unbuffered ECC 184-pin DIMM (p/n ATG) - 1GB PC2100 DDR266 CL2.0 2Rx8 Dual Rank Unbuffered ECC 184-pin DIMM (p/n ADN) - 1GB PC2100 DDR266 CL2.5 2Rx8 Dual Rank Unbuffered ECC 184-pin DIMM (p/n AHX) - 2GB PC3100 DDR266 CL2.5 2Rx8 36-chip Unbuffered ECC 184-pin DIMM (p/n CTH)

PC2100 DDR266 CL2 184-Pin ECC Registered DIMM Memory

(184 Pin CL2 DDR 266MHz Registered for Servers)

128MB PC2100 DDR266 Registered ECC 184-pin DIMM (p/n AQO) - 128MB PC2100 DDR266 184-pin SDRAM DIMM (p/n BDQ) - 256MB PC2100 DDR266 CL2 1Rx8 184-pin Registered ECC SDRAM DIMM (p/n AGF) - 512MB 184-pin PC2100 CL2 18-chip 64x4 Single-Bank Registered ECC DIMM (p/n AFO) - 1GB 2-in 184-pin PC2100 Registered ECC DDR SDRAM DIMM (p/n AAG)

PC2100 DDR266 CL2.5 184-Pin ECC Registered DIMM Memory

256MB PC2100 DDR266 CL2.5 1Rx8 Single Rank Registered ECC 184-pin DIMM (p/n ABH) - 512MB PC2100 DDR266 2Rx8 Dual Rank Registered ECC 184-pin DIMM (p/n AMC) - 1GB PC2100 DDR266 4Rx8 Quad Rank Registered ECC 184-pin DIMM (p/n AMD) - 1GB PC2100 DDR266 CL2.5 1Rx4 Single Rank Registered ECC 184-pin DIMM (p/n AAY) - 1GB PC2100 DDR266 CL2 1Rx4 single rank ECC Registered 184-pin DIMM (p/n AKY)


	PC2100 DDR266 200-Pin SODIMM Memory (DDR 266MHz 200 Pin Laptop Memory) 128MB PC2100 DDR266 200-Pin SODIMM(p/n APA) - 128MB 200p PC2100 CL2 DDR SODIMM (p/n BKX) - 128MB 200p PC2100 CL2.5 8c DDR SODIMM (p/n ARC) - 256MB 200-pin PC2100 CL2.5 8c 16x16 DDR SODIMM (p/n ADD) - 256MB 200-pin PC2100 CL2.5 4-Chip 32x16 DDR SODIMM Memory (p/n AHI)


	PC2700 DDR333 172-Pin MicroDIMM Memory (PC2700 DDR-333 172-pin microDIMM Laptop Memory) 256MB Micron Laptop PC2700 DDR333 microDIMM (p/n AFK) - 512MB PC2700 DDR333 172-pin Laptop microDIMM (p/n ACX) - 1GB Laptop PC2700 172-pin DDR333 MicroDIMM (p/n AJM) - 512MB 172-pin PC2700 DDR333 microDIMM (p/n BWO) -


	PC2700 DDR333 184-Pin UDIMM Memory (184 Pin DDR 333MHz Non ECC for Desktops) 128MB PC2700 DDR333 1Rx16 Single Rank Unbuffereed nonECC 184-pin DIMM (p/n AJW) - 512MB PC2700 DDR333 1Rx8 Unbuffered nonECC 184-pin DIMM (p/n AET) - 512MB Samsung PC2700 DDR333 2Rx8 Dual Rank Unbuffered nonECC 184-pin DIMM (p/n AXY) - 1GB PC2700 DDR333 2Rx8 Dual Rank 32-chip Unbuffered nonECC 184-pin UDIMM (p/n COC) -


	PC2700 DDR333 184-Pin ECC UDIMM Memory (184 Pin DDR 333MHz ECC for Desktops) 256MB 184pin PC2700 CL2.5 9c 32x8 ECC DDR DIMM (p/n ALN) - 512MB PC2700 DDR333 2Rx8 Dual Rank Unbuffered ECC 184-pin DIMM (p/n AEN) - 1GB PC2700 DDR333 2Rx8 Dual Rank Unbuffered ECC 184-pin DIMM (p/n AMM) - 2GB PC2700 DDR333 2Rx8 Dual Rank Unbuffered ECC 184-pin DIMM (p/n CQS) -

PC2700 DDR333 184-Pin ECC Registered DIMM

(184 Pin DDR 333MHz Registered for Servers)

256MB PC2700 DDR333 1Rx8 Single Rank Registered ECC 184-pin DIMM (p/n AIR) - 512MB PC2700 DDR333 1Rx4 Single Rank Registered ECC 184-pin DIMM (p/n AVG) - 512MB PC2700 DDR333 1Rx8 Single Rank Registered ECC 184-pin DIMM (p/n BAB) - 512MB 184-pin PC2700 CL2.5 18c 32x8 DDR333 Registered ECC DDR DIMM (p/n BAC) - 1GB PC2700 DDR333 CL2.5 2Rx8 Dual Rank Registered ECC 184-pin DIMM (p/n ADK)

PC2700 DDR333 200-Pin SODIMM Memory

(DDR 333MHz 200-Pin Laptop Memory)

256MB PC2700 DDR333 1Rx16 Single Rank 200-pin SODIMM (p/n ASA) - 256MB 200-pin PC2700 CL2.5 8c 16x16 DDR333 2Rx16 2.5V SODIMM (p/n ABU) - 256MB PC2700 DDR333 1Rx8 Single Rank 200-pin SODIMM (p/n AGU) - 256MB PC2700 DDR333 1Rx8 ECC 200-pin SODIMM (p/n CPI) - 512MB PC2700 DDR333 2Rx8 Dual Rank 16-chip 200-pin Notebook SODIMM (p/n AFA)

PC3200 DDR400 184-Pin non-ECC UDIMM

(184-Pin DDR-400MHz Non-ECC for Desktops)

128MB PC2700 DDR400 1Rx16 Single Rank Unbuffereed nonECC 184-pin DIMM (p/n ALG) - 256MB PC3200 DDR400 CL3 1Rx16 Single Rank Unbuffered nonECC 184-pin DIMM (p/n BNI) - 512MB PC3200 DDR400 2Rx16 Unbuffered nonECC 184-pin DIMM (p/n CKE) - 512MB 184-pin PC3200 CL3 16c 32x8 DDR400 2Rx8 2.5V SDRAM DIMM (p/n ABG) - 512MB 184-pin PC3200 CL3 8c 64x8 DDR DIMM (p/n AEG)

PC3200 DDR400 184-Pin ECC UDIMM

(184-Pin DDR-400MHz ECC non-registered for workstations)

256MB 184-pin PC3200 CL3 9c 32x8 ECC DDR DIMM (p/n ALD) - 512MB PC3200 DDR400 CL3 2Rx8 Dual Rank Unbuffered ECC 184-pin DIMM (p/n AJG) - 512MB 184-pin PC3200 DDR400 CL3 9c 64x8 ECC DDR DIMM (p/n AWM) - 1GB PC3200 DDR400 2Rx8 Dual Rank Unbuffered ECC 184-pin UDIMM (p/n AEI) - 1GB 184pin PC3200 CL3 18c 64x8 ECC DDR VLP DIMM (p/n CNR)

PC3200 DDR400 184-Pin ECC Registered DIMM

(184 Pin DDR 400MHz Registered for Servers)

256MB PC3200 DDR400 1Rx8 Single Rank Registered ECC 184-pin DIMM (p/n BKH) - 512MB PC3200 DDR400 1Rx4 Single Rank Registered ECC 184-pin DIMM (p/n AOL) - 512MB 184-pin PC3200 DDR400 CL3 18c 32x8 Registered ECC DDR DIMM (p/n AQW) - 512MB PC3200 DDR400 1Rx8 Single Rank Registered ECC 184-pin DIMM (p/n BMJ) - 512MB PC3200 DDR400 1Rx8 Single Rank Registered ECC 184-pin VLP (very low profile) DIMM (p/n BWG)

PC3200 DDR400 200-pin SODIMM

(PC3200 Memory DDR400 200-Pin SODIMM)

256MB PC3200 DDR400 1Rx8 Single Rank 200-pin SODIMM (p/n AIW) - 512MB PC3200 DDR400 2Rx8 Dual Rank 200-pin SODIMM (p/n AKG) - 512MB PC3200 DDR400 2Rx16 Dual Rank 200-pin Notebook SODIMM (p/n AOY) - 512MB PC3200 DDR400 1Rx8 Single Rank 200-pin Notebook SODIMM (p/nBMY) - 1GB PC3200 DDR400 2Rx8 Dual Rank 200-pin Notebook SODIMM (p/n AHK)


	PC3500 DIMM (184 pin, DDR433 non-registered Over-clocked DIMM)


	PC3700 DIMM (184 pin, DDR466 non-registered DIMM) 256MB PC3700 DDR466 184-pin DIMM (p/n BDL) - 512MB Twinmos PC3700 CL2.5 DDR466 184-pin DIMM (p/n AHJ) -


	PC4000 DIMM (184 pin, DDR500 non-registered DIMM) 256MB TwinMos/Twister PC4000 184p DDR DIMM (XDS256) - 512MB TwinMos/Twister PC4000 184p DDR DIMM (p/n XDS512) -

Identify Your Computer

Find & Add More Memory

DDR Memory

DDR Memory

DDR SDRAM Memory

Computer Memory Types